Modelling the Eddy Pattern in the harbour of Zeebrugge

Hydrodynamic

Variability in ostracod communities (Crustacea, Ostracoda) in connected and isolated tropical floodplain lakes

Floodplains mostly consist of primary and secondary riverbeds, connecting channels and lakes that are either isolated from rivers and channels for most of the year, or lakes that are connected to rivers and channels for most (or all) of the year. We hypothesize that the differences in invertebrate communities, as calculated by beta-diversities, will be higher in isolated than in connected lakes. We use ostracod communities in the pleuston of the floating macrophyte Eichhornia crassipes in the Upper Parana River floodplain to test this hypothesis. We have observed significant differences in species composition between the two types of lakes. However, although beta diversity values are indeed slightly higher in isolated than in connected lakes, these differences are not significant. This lack of clear effect of isolation on beta diversity could be owing to the fact that the period of isolation since the last homogenizing flood pulse had not been long enough, or because differences in degree of isolation become altogether insignificant in periods of low water flow

Relationship between Entrepreneurial Orientation and Project Management Maturity in Brazilian Software Firms

This paper aims to analyze the relationship between entrepreneurial orientation and project management maturity in software firms. Initially, the literature concerning both matters has been approached. Then, a conceptual model which suggests that the entrepreneurial orientation is positively related to the project management maturity, has been proposed. In order to evaluate this model, the Structural Equation Modeling technique has been adopted through the Partial Least Square method using a sample of 102 questionnaires given by managers of Brazilian software firms. The model was validated and the study hypothesis confirmed. The results of the study reveal that there is a positive relationship between entrepreneurial orientation and project management maturity in the surveyed firms. Thus, innovativeness, risk-taking and proactiveness exert a positive impact on the project management maturity, which is characterized by integration management, scope management, time management, cost management, quality management, human resources management, communications management, risk management and procurement management. The results collaborate with the theoretical discussions surrounding these subjects contributing to seal literature gap to combine entrepreneurship and project management. As managerial contributions, the study provides executives and managers to have a general view that the entrepreneurial orientation exerts beneficial impacts on the project management maturity

Reducing the power consumption in LTE-advanced wireless access networks by a capacity based deployment tool

As both the bit rate required by applications on mobile devices and the number of those mobile devices are steadily growing, wireless access networks need to be expanded. As wireless networks also consume a lot of energy, it is important to develop energy-efficient wireless access networks in the near future. In this study, a capacity-based deployment tool for the design of energy-efficient wireless access networks is proposed. Capacity-based means that the network responds to the instantaneous bit rate requirements of the users active in the selected area. To the best of our knowledge, such a deployment tool for energy-efficient wireless access networks has never been presented before. This deployment tool is applied to a realistic case in Ghent, Belgium, to investigate three main functionalities incorporated in LTE-Advanced: carrier aggregation, heterogeneous deployments, and Multiple-Input Multiple-Output (MIMO). The results show that it is recommended to introduce femtocell base stations, supporting both MIMO and carrier aggregation, into the network (heterogeneous deployment) to reduce the network's power consumption. For the selected area and the assumptions made, this results in a power consumption reduction up to 70%. Introducing femtocell base stations without MIMO and carrier aggregation can already result in a significant power consumption reduction of 38%

Modelling the Eddy Pattern in the Harbour of Zeebrugge

Hydrodynamic

Mixed Matrix Carbon Molecular Sieve and Alumina (CMS-Al₂O₃) Membranes

This work shows mixed matrix inorganic membranes prepared by the vacuum-assisted impregnation method, where phenolic resin precursors filled the pore of a-alumina substrates. Upon carbonisation, the phenolic resin decomposed into several fragments derived from the backbone of the resin matrix. The final stages of decomposition (>650 degrees C) led to a formation of carbon molecular sieve (CMS) structures, reaching the lowest average pore sizes of similar to 5 angstrom at carbonisation temperatures of 700 degrees C. The combination of vacuum-assisted impregnation and carbonisation led to the formation of mixed matrix of CMS and a-alumina particles (CMS-Al2O3) in a single membrane. These membranes were tested for pervaporative desalination and gave very high water fluxes of up to 25 kg m(-2) h(-1) for seawater (NaCl 3.5 wt%) at 75 degrees C. Salt rejection was also very high varying between 93-99% depending on temperature and feed salt concentration. Interestingly, the water fluxes remained almost constant and were not affected as feed salt concentration increased from 0.3, 1 and 3.5 wt%

On Non-Abelian Symplectic Cutting

We discuss symplectic cutting for Hamiltonian actions of non-Abelian compact groups. By using a degeneration based on the Vinberg monoid we give, in good cases, a global quotient description of a surgery construction introduced by Woodward and Meinrenken, and show it can be interpreted in algebro-geometric terms. A key ingredient is the `universal cut' of the cotangent bundle of the group itself, which is identified with a moduli space of framed bundles on chains of projective lines recently introduced by the authors.Comment: Various edits made, to appear in Transformation Groups. 28 pages, 8 figure

Relationship between Entrepreneurial Orientation and Project Management Maturity in Brazilian Software Firms

<p>This paper aims to analyze the relationship between entrepreneurial orientation and project management maturity in software firms. Initially, the literature concerning both matters has been approached. Then, a conceptual model which suggests that the entrepreneurial orientation is positively related to the project management maturity, has been proposed. In order to evaluate this model, the Structural Equation Modeling technique has been adopted through the Partial Least Square method using a sample of 102 questionnaires given by managers of Brazilian software firms. The model was validated and the study hypothesis confirmed. The results of the study reveal that there is a positive relationship between entrepreneurial orientation and project management maturity in the surveyed firms. Thus, innovativeness, risk-taking and proactiveness exert a positive impact on the project management maturity, which is characterized by integration management, scope management, time management, cost management, quality management, human resources management, communications management, risk management and procurement management. The results collaborate with the theoretical discussions surrounding these subjects contributing to seal literature gap to combine entrepreneurship and project management. As managerial contributions, the study provides executives and managers to have a general view that the entrepreneurial orientation exerts beneficial impacts on the project management maturity.</p

Relationship between Entrepreneurial Orientation and Project Management Maturity in Brazilian Software Firms

This paper aims to analyze the relationship between entrepreneurial orientation and project management maturity in software firms. Initially, the literature concerning both matters has been approached. Then, a conceptual model which suggests that the entrepreneurial orientation is positively related to the project management maturity, has been proposed. In order to evaluate this model, the Structural Equation Modeling technique has been adopted through the Partial Least Square method using a sample of 102 questionnaires given by managers of Brazilian software firms. The model was validated and the study hypothesis confirmed. The results of the study reveal that there is a positive relationship between entrepreneurial orientation and project management maturity in the surveyed firms. Thus, innovativeness, risk-taking and proactiveness exert a positive impact on the project management maturity, which is characterized by integration management, scope management, time management, cost management, quality management, human resources management, communications management, risk management and procurement management. The results collaborate with the theoretical discussions surrounding these subjects contributing to seal literature gap to combine entrepreneurship and project management. As managerial contributions, the study provides executives and managers to have a general view that the entrepreneurial orientation exerts beneficial impacts on the project management maturity

Light-Induced Metastable Magnetic Texture Uncovered by in situ Lorentz Microscopy

Magnetic topological defects, such as vortices and Skyrmions, can be stabilized as equilibrium structures in nanoscale geometries and by tailored intrinsic magnetic interactions. Here, employing rapid quench conditions, we report the observation of a light-induced metastable magnetic texture, which consists of a dense nanoscale network of vortices and antivortices. Our results demonstrate the emergence of ordering mechanisms in quenched optically driven systems, which may give a general access to novel magnetic structures on nanometer length scales